https://medlineplus.gov/lab-tests/hemoglobin-a1c-hba1c-test/
Hemoglobin A1C (HbA1c) Test: MedlinePlus Medical Test
A hemoglobin A1C test is a blood test that measures the amount of glucose (sugar) attached to hemoglobin. High A1C levels can be a sign of diabetes. Learn more.
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